{
  "manageEntity": {
    "action": "Save",
    "entityId": "1219007108",
    "entityType": "Track",
    "nonce": "0x6106c5c576a9f2807c34d463805faae23b611a82444303b1cff33fbf7a3ce707",
    "signature": "0x15ac0f11d27e8f1ac0b6980f76bf9c3876fffa5b521239c52fff25f7706b6592253da8dd2a58dd60f05d1ebf6b457442253e98b92b041d6eb8ca003335cfd5951b",
    "signer": "0x0fe82f565AaE260D57b8e691c61Fb05fE83B6F81",
    "userId": "614212580"
  }
}